package com.sky.service.impl;

import com.alibaba.fastjson.JSON;
import com.alibaba.fastjson.JSONObject;
import com.sky.constant.JwtClaimsConstant;
import com.sky.constant.MessageConstant;
import com.sky.dto.UserLoginDTO;
import com.sky.entity.User;
import com.sky.exception.LoginFailedException;
import com.sky.mapper.UserMapper;
import com.sky.properties.JwtProperties;
import com.sky.properties.WeChatProperties;
import com.sky.result.Result;
import com.sky.service.UserService;
import com.sky.utils.HttpClientUtil;
import com.sky.utils.JwtUtil;
import com.sky.vo.UserLoginVO;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import javax.security.auth.login.LoginException;
import java.time.LocalDateTime;
import java.util.HashMap;
import java.util.Map;

@Service
@Slf4j
public class UserServiceImpl implements UserService {
    @Autowired
    private JwtProperties jwtProperties;

    @Autowired
    private WeChatProperties weChatProperties;

    @Autowired
    private UserMapper userMapper;

    private static final String WX_LOGIN_URL = "https://api.weixin.qq.com/sns/jscode2session";

    @Override
    public Result<UserLoginVO> login(UserLoginDTO userLoginDTO) {
        User user = wxLogin(userLoginDTO);
        Map<String, Object> claims = new HashMap<>();
        claims.put(JwtClaimsConstant.USER_ID, user.getId());
        String token = JwtUtil.createJWT(jwtProperties.getUserSecretKey(),
                jwtProperties.getUserTtl(), claims);
        UserLoginVO userLoginVO = UserLoginVO.builder()
                .id(user.getId())
                .token(token)
                .openid(user.getOpenid())
                .build();
        return Result.success(userLoginVO);


    }

    private User wxLogin(UserLoginDTO userLoginDTO) {
        //调用微信接口获取openid
        Map<String, String> map = new HashMap<>();
        map.put("appid", weChatProperties.getAppid());
        map.put("secret", weChatProperties.getSecret());
        map.put("js_code", userLoginDTO.getCode());
        map.put("grant_type", "authorization_code");
        String json = HttpClientUtil.doGet(WX_LOGIN_URL, map);
        //校验openid
        JSONObject jsonObject = JSON.parseObject(json);
        log.info("获取到微信服务器信息：{}",json);
        String openid = (String) jsonObject.get("openid");

        if (openid == null) {
            throw new LoginFailedException(MessageConstant.LOGIN_FAILED);
        }

        //校验是否新用户
        User user = userMapper.getByOpenId(openid);


        if (user == null) {
            //判断为新用户
            user = User.builder()
                    .openid(openid)
                    .createTime(LocalDateTime.now())
                    .build();
            userMapper.save(user);
        }
        return user;
    }
}
